A.20~20000Hz
B.10~10000Hz
C.10~100000Hz
D.50~50000Hz
E.10~50000Hz
[单选题]标准正常人耳能听到的频率为A.20~20000HzB.10~10000HzC.10~100000HzD.50~50000HzE.10~50000Hz
[单选题]正常人耳所能听到的声音范围在()KHz。A .15~20B .20~25C .25~30D .30~35
[单选题,A2型题,A1/A2型题] 人耳能听到的声波频率为()。A . 20~2000HzB . 20~20000HzC . 200~2000HzD . 2000~20000HzE . 20~200000Hz
[单选题]人耳能听到的声波频率为( )。A.20~2000HzB.20~20000HzC.200~2000HzD.2000~20000HzE.20~20000
[单选题]人耳能听到的声波频率为A.20~2000HzB.20~20000HzC.200~2000HzD.2000~20000HzE.20~200000Hz
[单选题]人耳能听到的声波频率为A.20~2000HzB.20~20000HzC.200~2000HzD.2000~20000HzE.20~200000Hz
[判断题]正常人刚刚能听到的最微弱声音的声压为20Pa,称为人耳的“听阈”。()A.对B.错
[判断题]正常人刚刚能听到的最微弱声音的声压为20Pa,称为人耳的“听阈”。()A.对B.错
[填空题] 人耳能听到的声波频率范围约在()。
[单选题]人耳能听到的声音频率范围是()。A.20~20KHZB.50~10KHZC.20~10KHZD.50~20KHZ